Materials Literature
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We report in situ Raman scattering studies of electrochemically top gated VO 2 thin film to address metal-insulator transition (MIT) under gating. The room temperature monoclinic insulating phase goes to metallic state at a gate voltage of 2.6 V. However, the number of Raman modes do not change with electrolyte gating…
Hierarchical assembly of plasmonic nanostructures can induce high surface-enhanced Raman scattering (SERS) activity. However, it is a challenge to uniformly disperse the hierarchical nanostructures onto a planar substrate to achieve SERS signal reproducibility. This report presents a facile route to fabricate a hexago…
The most important practical application of graphene nanoplatelets (GNPs) would be as nanofillers for polymer nanocomposites. However, the modification of GNPs is needed to improve the interfacial adhesion between GNPs and a polymer matrix. Therefore, in this study, the alkylation of GNPs by dodecylamine was carried o…
Chemical co-precipitation method was used to prepare Gd2Zr2O7 powders. The powders were then heated in air at 1500°C, 1510°C, 1525°C, 1530°C, 1550°C, 1575°C, 1600°C for 5 h, and 1575°C, 1600°C for 10 h, respectively. The samples after heat treatment were characterized by X-ray diffraction and Raman spectroscopy. X-ray…
A new terbium sensitized spectrofluorimetric method was developed for the determination of trace amounts of dopamine (DA) using ethylenediaminetetraacetic acid as co-ligand and cetyltrimethylammonium chloride as sensitizer. UV absorption and fluorescent spectra were used to investigate the photophysical properties of…
This paper provides an overview of how the surface properties of ferromagnetic nanoparticles dispersed in fluids is modified by natural and biocompatible polymers. Among common magnetic nanoparticles, magnetite (Fe3O4) and maghemite (g-Fe203) are popular candidates because of their biocompatibility. Natural polymeric…
BACKGROUND: Nowadays, magnetic nanoparticles (MNPs) have received much attention because of their enormous potentials in many fields such as magnetic fluid hyperthermia (MFH). The goal of hyperthermia is to increase the temperature of malignant cells to destroy them without any lethal effect on normal tissues. To inve…
Cellulose nanocrystals (CNCs) have evolved from a laboratory curiosity to an industrial material manufactured at a scale of up to 1 ton/day. In order to maximize their use in various applications such as composites, it is critical to evaluate the influence of the surface chemistry on their thermal stability. The effec…
Innovative methods of preform manufacturing using the TFP technology, radial braiding as well as the description of equipment are presented. Efficiency of Siemens NX, FiberSim and PAMRTM (ESI Group) software for design and simulation of integral panels and technology is demonstrated.
A theoretical and experimental method for determining the elastic and damping characteristics of materials is proposed based on analysis of vibrograms of damping flexural vibrations of test specimens with different structures. It is shown that during tension–compression and shear of a carbon fiber-reinforced plastic m…
Recently published data concerning the preparation and valuable properties of organosilicon compounds of silatrane structure with carbofunctional sulfur-containing substituents (thiol, sulfide, disulfide, polysulfide) and heteroatomic sulfur-containing groups (thiourea, thiourea dioxide, dithiocarbamate, thiuram disul…
The combustion of chromium powder in a coflow of nitrogen-containing gas in a range of specific flow rate of up to 20 cm 3 /(s · cm 2 ) is studied. The use of forced filtration intensifies the combustion wave propagation in the Cr–N 2 system. In this case, the combustion rate increases simultaneously with the decreasi…
We report the results on the measurements of the work function of single-walled carbon nanotubes encapsulated by Agl (AgI@SWCNT), AgCl (AgCl@SWCNT), and CuBr (CuBr@SWCNT) by the local Kelvin probe technique. We found the values of the work function of tubes encapsulated with AgI and AgCl (Φ(AgI@SWCNT) = 5.08 ± 0.02, Φ…
In forecoming “more electrical aircrafts”, aircrafts will become more compact and lighter. Hydraulic, pneumatic or mechanical systems will be replaced by electrical ones thus leading to an increased demand of electric power. The network voltage is expected to increase far above Paschen's minimum, thus increasing the r…
The incorporation of spray-dried cellulose nanocrystals (CNCs) into thermoplastics raises the question about the degree of the mixing, given that typically the former are hydrophilic and the latter hydrophobic. Raman imaging has been used as a non-destructive method for the spatial quantification of the mixing process…
RTV coatings had been widely used in electric insulators to prevent pollution flashover performance at external insulation. For the bad weatherability of polymers, RTV coatings will be aging during the long serve time. To remove the aging coatings, many methods had been used, such as solvent dissolve, high pressure wa…
Integration of decentralised renewable energy sources lead to an increasingly fluctuating load profile of power engineering equipment. In particular, on large rotating machines this changing load profiles continuously stress the insulation in form of mechanical and thermo-mechanical forces. Eventually, a mechanical ov…
This paper studies the influence of the organosilicone modifier of phenyl ethoxysilane on the properties of sealing composition. It is shown that the injection of 2–4% phenyl ethoxysilane in the epoxy binder enhances and stabilizes dielectric properties of the sealing composition in highly humid conditions and increas…
Heat setting is an expensive and energy elaborative textile process. Heat setting is necessary to guarantee size accuracy and dimensional stability for textile materials. Depending on the material different heat setting methods such as saturated steam or hot air are used for the fixation. The research aim is to define…
Level anticrossing (LAC) spectroscopy has been demonstrated on a family of uniaxially oriented spin color centers with S = 3/2 in the ground and excited states in hexagonal 4H-, 6H-, and rhombic 15R-SiC polytypes. It has been shown that these centers exhibit unique characteristics such as optical spin alignment up to…